Improvement in tacking-machines for boots and shoes



H. G., THOMPSON & B. F. BERGH.

NTTED STATES PATENT FFIGE.

HENRY G. THOMPSON AND BROR F. BERGH, OF MILFORD, CONNECTICUT; SAID BERGHASSIGNOR TO SAID THOMPSON.

IMPROVEMENT lN TACKlNG-MACHINES FOR BOOTS AND SHOES.

Specification forming part of Letters Patent No. 153,467, dated July 28,1874; application filed April 1e, 1814.

To all whom it may concern:

Beit known that we, HENRY G. THOMP- SON and BROR F. BERGH, of Milford,county of New Haven and State of Connecticut, have invented certain newand useful Improvements in Tacking Machine for Boots and Shoes, of whichthe following is a specification:

Our invention relates to suchftack-driving machines in which the tacksare deposited in a revolving feeding-cylinder, provided with astationary front head, and the entire feeding mechanism movedalternately to and from the hammer, and in which the tacks are fed downan incline from the interior of said cylinder to the front thereof; andthe nature of our invention consists in feeding the tacks at an anglefrom the direct line and switchingthem off for presentation to thehammer, preparatory to being taken upand driven; also, in

lifting or presenting` the tacks to A'the' hammer by their heads, and inthe construction and arrangement of devices whereby said objects areaccomplished.

In the accompanying drawing, we have only deemed it necessary to show somilch of a tack-driving machine as will illustrate our invention.

Figure lis a perspective view of the stationary head of the revolvingcylinder with the devices connected therewith, except `the feed device,which is removed. Fig. 2 is a bottom view of the saine. Figs. Sand 4show the feed device. Figs. 5 and 6 show the device by which the tacksare lifted and presented to the hammer.

A represents the stationary head for a revolvin g feed-cylinder of atack-driving machine, in which the entire mechanism is moved alternatelyto and from the hammer. B represents the inclined bar passing throughand attached to said head A, which incline is in its upper side providedwith a tack-channel,

a. At the front end of the incline B is formed a horizontalsegment-platform, C, in which is a channel, b, leading to one side, orswitching off from the channel a in the incline B. The front side of thesegmental platform C has at the bottom a straight shoulder or offset, d,as shown. To the under side of the platform C is pivoted a T-shapedlever, D, the front arm of which is formed at its end with a tube orcylinder, j', standing in a vertical position. On the lower end of thistube is screwed a cup, h, within which is placed a spring, Passingdownward through the tube f and resting uponthe spring i' is a shaft, k,provided at its upper end with win gs m m', which are curved tocorrespond with the curvature of the front edge of the platform C andbear against the same. To the shaft k is also affixed a beveled lug, e,which bears against the un der side of the platform at the shoulder d..The lever D is held in its normal position by springs E, so that agroove, av, on the inner side of the shaft k will be opposite to andform connection with the switch-channel b, and the upperyvend of theshaft and the upper edge of the wing m are, by the lug e, held flushwith-the upper surface of the platformthat is, this lug prevents themfrom rising above the same`while a pin, a, on the front face of theplatform, acting against the under side of the wing m', prevents themfrom being pressed down below the upper surface of the platform when inthat position. On the front of the shoulder d is secured a spring, p,provided with a beveled projection on its inner free end nearest to theshaft k. -In the front edge of the platform C is cut out a recess, y,which is on a line with the main channel a.

The feed device is substantially the same as that described in aseparate application made by us for a tack-driving machine, and may bebriefly described as follows: G is a plate pivoted or hung in ears r 1'on the front face of the head A, and bent or curved to correspond withthe angle of the channels a b. H is the lever operating the leather orrubber piece I, which moves the tacks. The stroke of this lever isregulated by a set-screw, s.

In describing the operation of our present invention, it must beremembered that the en tire mechanism is moved alternately to and fromlthe hammer, and that the feeding device G H I is operated by saidreciprocating move ment to move one tack at a time from theswitch-channel b into the groove :c on the shaft k. During the forwardmovement of the machine one of the rear arms of the lever D is operatedupon by a suitable device on the frame of the machine, so as to bcturned upon its pivot and carry the shaft k, with the tack in the groovex, toward the center opposite to the recess y. This movement, however,depresses the shaft k by the action of the beveled lug e upon the lug oof the spring p, and as soon as the lug e passes the lug o the spring iin the cup h raises the shaft k up again, which shaft thus lifts thetack by the head and presents it to the hammer. The springs `E thenthrow the lever D back to its original position, the spring lo yieldingto alv low the lug e to pass the lug o. By adjusting the cup h more orless elevation may be imparted to the tack, as required.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. In a tack-driving machine a switch-channel b, in combination With afeeding device for carrying the tacks away from the straight line,substantially as herein set forth.

2. In a tack-driving machine, provided with a switch-channel for tacks,an automatic mechanism for taking the tacks from said switch-channel andlifting `or presentingthem to the hammer by their heads,substantially asherein set forth.

3. The vertically-moving shaft k, provided with the groove w and movingwith the lever D on the are of a circle, in combination withswitch-channel b and feeding device, substantially as and for thepurposes herein set forth.

4. The beveled lug e on the shaft 7c, in combination with the spring pand beveled lug 0,

for the purposes herein set forth.

5. The combination of the shaft k, tube f, spring i, and adjustable cuph, substantially as and for the purposes herein set forth.

In testimony that We claim the foregoing as our invention We hereuntoaffix our signatures this 16th day of April, 1874.

HENRY G. THOMPSON. n. n. Banen.

Witnesses:

FRANK L. ALLIs, P. S. BRISTOL.

